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US Patent: 82,769
Improvement in Adjusting Spirit Levels
Patentee: Justus A. Traut (exact or similar names) - New Britain, CT USPTO Classifications: 33/385 Tool Categories: layout tools : levels Assignees: The Stanley Rule & Level Co. - New Britain, CT Manufacturer: The Stanley Rule & Level Co. - New Britain, CT Witnesses: N. C. Wilder Jeremy W. Bliss	Patent Dates: Granted: Oct. 06, 1868 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Russ Allen.
Description: Adjustment is made without removing the plate but use of screws and a "yielding material" or springs.

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